Book to recommend to therapist about dissociation?

Brief question: What book should my therapist read that explains dissociation, DID, dissociated parts/alters, etc?

Context: I have been told by my previous therapist that I have a dissociative disorder (I switched in session) and my current therapist says I have CPTSD. She is not very well versed in dissociation. Today she told me she thinks I have ADHD. I highly doubt that, and think it's just my trauma, CPTSD, anxiety, and weed use causing her to think that I have ADHD(she doesn't know about the weed yet. Dissociative symptoms were present waaaaay before I ever touched any substance).

What book would you recommend that would make her understand dissociation more, that also includes identity alteration, and preferably DID/OSDD. We have both read Pete Walker's book about CPTSD. She told me she has been reading ADHD books lately, Gabor Mate being one of those. She has read things about IFS. I would like to suggest that she reads a book so she knows where I'm at and understands dissociation more.

I haven't flat out told her about the other people in my head, but she does use a lot of parts talk, and says "system" like in IFS. So I can communicate sometimes what some alter feels, or thinks with the language she uses, but it feels incomplete. I do not have access to a dissociation specialist, those don't exist in my country. Trauma therapists barely exist in my city and the ones that do are expensive. This therapist is helpful, but she has only read about dissociation in the context of BPD and a little in the context of CPTSD. Which is the best book to educate her?

Thanks